/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.pig.pigpen.editor;

import org.apache.pig.pigpen.editor.model.HeaderItem;
import org.eclipse.jface.viewers.ICellModifier;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.swt.widgets.TableItem;

public class HeaderCellModifier implements ICellModifier {

    private PigPenEditor editor;

    public HeaderCellModifier(PigPenEditor editor, TableViewer viewer) {
        this.editor = editor;
    }

    public boolean canModify(Object element, String property) {
        return true;
    }

    public Object getValue(Object element, String property) {
        if (element instanceof HeaderItem)
            return ((HeaderItem) element).getString();
        else if (element instanceof String)
            return element;
        else
            return null;
    }

    public void modify(Object element, String property, Object value) {
        if (value == null)
            return;

        String str = ((String) value).trim();

        if (element instanceof TableItem)
            element = ((TableItem) element).getData();

        if (element instanceof HeaderItem) {
            ((HeaderItem) element).setString(str);
        }
    }

}
